syzbot |
sign-in | mailing list | source | docs |
| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| upstream | possible deadlock in proc_pid_syscall (2) fs | 2 | 1514d | 1524d | 19/28 | fixed on 2021/03/10 01:48 | |||
| upstream | possible deadlock in proc_pid_syscall fs | 11 | 1672d | 1810d | 0/28 | auto-closed as invalid on 2020/07/31 06:50 | |||
| linux-4.14 | possible deadlock in proc_pid_syscall | C | error | 19 | 778d | 1543d | 0/1 | upstream: reported C repro on 2020/08/09 14:10 |
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
======================================================
WARNING: possible circular locking dependency detected
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
4.19.191-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.2/9562 is trying to acquire lock:
000000003f26e7b9 (&sig->cred_guard_mutex){+.+.}, at: lock_trace fs/proc/base.c:402 [inline]
000000003f26e7b9 (&sig->cred_guard_mutex){+.+.}, at: proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635
but task is already holding lock:
00000000da084160 (&p->lock){+.+.}, at: seq_read+0x6b/0x1160 fs/seq_file.c:161
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&p->lock){+.+.}:
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
seq_read+0x6b/0x1160 fs/seq_file.c:161
do_loop_readv_writev fs/read_write.c:701 [inline]
do_loop_readv_writev fs/read_write.c:688 [inline]
do_iter_read+0x471/0x630 fs/read_write.c:925
vfs_readv+0xe5/0x150 fs/read_write.c:987
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
kernel_readv fs/splice.c:362 [inline]
default_file_splice_read+0x457/0xa00 fs/splice.c:417
do_splice_to+0x10e/0x160 fs/splice.c:881
splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
do_splice_direct+0x1a7/0x270 fs/splice.c:1068
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
do_sendfile+0x550/0xc30 fs/read_write.c:1447
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
__do_sys_sendfile64 fs/read_write.c:1508 [inline]
__se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #2 (sb_writers#3){.+.+}:
sb_start_write include/linux/fs.h:1579 [inline]
mnt_want_write+0x3a/0xb0 fs/namespace.c:360
ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:600
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
lookup_open+0x893/0x1a20 fs/namei.c:3235
do_last fs/namei.c:3327 [inline]
path_openat+0x1094/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
ieee80211 phy10: Selected rate control algorithm 'minstrel_ht'
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
-> #1 (&ovl_i_mutex_dir_key[depth]){++++}:
inode_lock_shared include/linux/fs.h:758 [inline]
do_last fs/namei.c:3326 [inline]
path_openat+0x17ec/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_open_execat+0x11d/0x5b0 fs/exec.c:853
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
__do_execve_file+0x1a8b/0x2360 fs/exec.c:1770
do_execveat_common fs/exec.c:1879 [inline]
do_execve+0x35/0x50 fs/exec.c:1896
__do_sys_execve fs/exec.c:1977 [inline]
__se_sys_execve fs/exec.c:1972 [inline]
__x64_sys_execve+0x7c/0xa0 fs/exec.c:1972
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
-> #0 (&sig->cred_guard_mutex){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:928 [inline]
__mutex_lock+0xd7/0x1260 kernel/locking/mutex.c:1075
lock_trace fs/proc/base.c:402 [inline]
proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635
proc_single_show+0xeb/0x170 fs/proc/base.c:755
seq_read+0x4be/0x1160 fs/seq_file.c:229
ieee80211 phy11: Selected rate control algorithm 'minstrel_ht'
do_loop_readv_writev fs/read_write.c:701 [inline]
do_loop_readv_writev fs/read_write.c:688 [inline]
do_iter_read+0x471/0x630 fs/read_write.c:925
vfs_readv+0xe5/0x150 fs/read_write.c:987
kernel_readv fs/splice.c:362 [inline]
default_file_splice_read+0x457/0xa00 fs/splice.c:417
do_splice_to+0x10e/0x160 fs/splice.c:881
splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
do_splice_direct+0x1a7/0x270 fs/splice.c:1068
do_sendfile+0x550/0xc30 fs/read_write.c:1447
__do_sys_sendfile64 fs/read_write.c:1508 [inline]
__se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
&sig->cred_guard_mutex --> sb_writers#3 --> &p->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&p->lock);
lock(sb_writers#3);
lock(&p->lock);
lock(&sig->cred_guard_mutex);
*** DEADLOCK ***
2 locks held by syz-executor.2/9562:
#0: 0000000025209a34 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
#0: 0000000025209a34 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446
#1: 00000000da084160 (&p->lock){+.+.}, at: seq_read+0x6b/0x1160 fs/seq_file.c:161
stack backtrace:
CPU: 0 PID: 9562 Comm: syz-executor.2 Not tainted 4.19.191-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222
check_prev_add kernel/locking/lockdep.c:1866 [inline]
check_prevs_add kernel/locking/lockdep.c:1979 [inline]
validate_chain kernel/locking/lockdep.c:2420 [inline]
__lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416
lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
__mutex_lock_common kernel/locking/mutex.c:928 [inline]
__mutex_lock+0xd7/0x1260 kernel/locking/mutex.c:1075
lock_trace fs/proc/base.c:402 [inline]
proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635
proc_single_show+0xeb/0x170 fs/proc/base.c:755
seq_read+0x4be/0x1160 fs/seq_file.c:229
do_loop_readv_writev fs/read_write.c:701 [inline]
do_loop_readv_writev fs/read_write.c:688 [inline]
do_iter_read+0x471/0x630 fs/read_write.c:925
vfs_readv+0xe5/0x150 fs/read_write.c:987
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
kernel_readv fs/splice.c:362 [inline]
default_file_splice_read+0x457/0xa00 fs/splice.c:417
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
ieee80211 phy12: Selected rate control algorithm 'minstrel_ht'
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
do_splice_to+0x10e/0x160 fs/splice.c:881
splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
ieee80211 phy13: Selected rate control algorithm 'minstrel_ht'
do_splice_direct+0x1a7/0x270 fs/splice.c:1068
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
do_sendfile+0x550/0xc30 fs/read_write.c:1447
__do_sys_sendfile64 fs/read_write.c:1508 [inline]
__se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6087737188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
overlayfs: './bus' not a directory
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffd2d4933bf R14: 00007f6087737300 R15: 0000000000022000
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
audit: type=1800 audit(1621882336.927:2): pid=9691 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.5" name="bus" dev="overlay" ino=13931 res=0
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
audit: type=1800 audit(1621882337.007:3): pid=9700 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="bus" dev="overlay" ino=13947 res=0
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
audit: type=1800 audit(1621882337.698:4): pid=9845 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.3" name="bus" dev="overlay" ino=13908 res=0
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
overlayfs: './bus' not a directory
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021/05/24 19:07 | linux-4.19.y | 1e986fe9ad15 | 3c7fef33 | .config | console log | report | syz | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/12/26 00:55 | linux-4.19.y | 3f8a27f9e27b | 9da18ae8 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/11/15 08:00 | linux-4.19.y | 3f8a27f9e27b | 97de9cfc | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/10/30 09:53 | linux-4.19.y | 3f8a27f9e27b | 2a71366b | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/10/20 21:43 | linux-4.19.y | 3f8a27f9e27b | a0fd4dab | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/10/01 15:36 | linux-4.19.y | 3f8a27f9e27b | feb56351 | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/09/19 21:24 | linux-4.19.y | 3f8a27f9e27b | dd9a85ff | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/09/05 00:52 | linux-4.19.y | 3f8a27f9e27b | 28811d0a | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/09/04 17:18 | linux-4.19.y | 3f8a27f9e27b | 28811d0a | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/09/04 05:34 | linux-4.19.y | 3f8a27f9e27b | 28811d0a | .config | console log | report | info | [disk image] [vmlinux] | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | ||
| 2022/08/15 13:20 | linux-4.19.y | 3f8a27f9e27b | 8dfcaa3d | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/08/04 03:23 | linux-4.19.y | 3f8a27f9e27b | 1c9013ac | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/07/20 12:17 | linux-4.19.y | 3f8a27f9e27b | 775344bc | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/07/12 02:43 | linux-4.19.y | 3f8a27f9e27b | da3d6955 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/07/10 12:35 | linux-4.19.y | 3f8a27f9e27b | b5765a15 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/07/02 00:04 | linux-4.19.y | 3f8a27f9e27b | 1434eec0 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/06/21 16:44 | linux-4.19.y | 3f8a27f9e27b | 0fc5c330 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/06/18 10:05 | linux-4.19.y | 3f8a27f9e27b | 8f633d84 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/06/16 14:22 | linux-4.19.y | 3f8a27f9e27b | 1719ee24 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/06/03 16:54 | linux-4.19.y | 3f8a27f9e27b | eee80d3c | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/06/01 19:54 | linux-4.19.y | 3f8a27f9e27b | b4bc6a3d | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/05/30 16:19 | linux-4.19.y | 3f8a27f9e27b | af70c3a9 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/05/23 02:21 | linux-4.19.y | 3f8a27f9e27b | 7268fa62 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/05/16 02:06 | linux-4.19.y | 3f8a27f9e27b | 744a39e2 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/05/02 01:53 | linux-4.19.y | 3f8a27f9e27b | 2df221f6 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/04/26 21:55 | linux-4.19.y | 3f8a27f9e27b | 1fa34c1b | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/04/16 12:37 | linux-4.19.y | 3f8a27f9e27b | 8bcc32a6 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/04/11 21:48 | linux-4.19.y | 3f8a27f9e27b | af01ee7d | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/03/12 01:59 | linux-4.19.y | 3f8a27f9e27b | 9e8eaa75 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/03/06 02:16 | linux-4.19.y | 3f8a27f9e27b | 7bdd8b2c | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/03/03 22:06 | linux-4.19.y | 3f8a27f9e27b | 45a13a73 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/17 10:07 | linux-4.19.y | 3f8a27f9e27b | 2bea8a27 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/16 20:48 | linux-4.19.y | 3f8a27f9e27b | 50221962 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/15 11:57 | linux-4.19.y | 3f8a27f9e27b | 8b9ca619 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/10 17:04 | linux-4.19.y | 3f8a27f9e27b | 0b33604d | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/08 01:26 | linux-4.19.y | 3f8a27f9e27b | a7dab638 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/04 00:58 | linux-4.19.y | 3f8a27f9e27b | 30646bfe | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/03 20:55 | linux-4.19.y | 3f8a27f9e27b | 30646bfe | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/02 10:54 | linux-4.19.y | 3f8a27f9e27b | 4ebb2798 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/02/02 07:41 | linux-4.19.y | 3f8a27f9e27b | 4ebb2798 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/01/30 11:10 | linux-4.19.y | 3f8a27f9e27b | 495e00c5 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/01/30 06:27 | linux-4.19.y | 3f8a27f9e27b | 495e00c5 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2022/01/30 05:45 | linux-4.19.y | 3f8a27f9e27b | 495e00c5 | .config | console log | report | info | ci2-linux-4-19 | possible deadlock in proc_pid_syscall | |||
| 2020/11/26 14:56 | linux-4.19.y | 0c88e405c97e | 2f1cec62 | .config | console log | report | info | ci2-linux-4-19 | ||||
| 2020/06/24 12:57 | linux-4.19.y | b3a99fd385fa | 41694dbf | .config | console log | report | ci2-linux-4-19 |